CN113380189B - Time sequence controller - Google Patents
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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Abstract
A timing controller includes an image compensation unit for generating compensated image data. The image compensation unit is used for: dividing an input image into a plurality of image blocks; selecting a plurality of pixels contained in one line of the image block as a plurality of target pixels; generating an average representative gray-scale value of the image block according to the histogram of the gray-scale values of the pixels included in the image block; inputting the average representative gray scale value into a first lookup table to obtain a first gain; inputting the vertical pixel position of the target pixel and the average representative gray scale value into a second lookup table to obtain a second gain; obtaining a compensated gray scale value by multiplying the gray scale value, the first gain and the second gain; and replacing the gray scale value with the compensated gray scale value to obtain compensated image data.
Description
Technical Field
The present invention relates to a timing controller, and more particularly, to a method for operating a timing controller of an organic light-emitting diode (OLED) display device, which is used to improve the brightness decay (brightness degradation) caused by the circuit voltage Drop (IR-Drop) phenomenon.
Background
An organic light-emitting diode (OLED) display device has many advantages such as self-luminescence, low driving voltage, high luminous efficiency, short response time, high definition and contrast, a visual angle close to 180 degrees, wide use temperature range, and capability of realizing flexible display and large-area full-color display, so that the OLED display device is known in the industry as a display device with the most development potential.
With the progress of the times and technologies, large-sized and high-resolution organic light emitting diode display devices are gradually developed. Accordingly, a larger size of the organic light emitting diode display device also requires a larger size of the panel and a larger number of pixels, and the length of the wires of the panel will be longer and longer, so that the resistance of the wires will be larger. Inevitably, the supply voltage to the pixels close to the voltage source is relatively high, while the supply voltage to the pixels far from the voltage source is relatively low, a phenomenon known as circuit Drop (IR-Drop). The phenomenon of circuit Drop (IR-Drop) causes display brightness non-uniformity across the panel, also known as brightness decay (brightness degradation).
Disclosure of Invention
The invention provides a time sequence controller, which comprises a receiving unit, an image compensation unit and a transmission unit. The receiving unit is used for receiving image data of an input image, wherein the input image comprises a plurality of pixels. The image compensation unit is used for generating compensated image data according to the image data. The transmission unit is used for outputting the compensated image data, so that the display device comprising the time schedule controller performs picture display according to the compensated image data. The image compensation unit is further configured to: dividing an input image into a plurality of image blocks along a horizontal direction; selecting a plurality of pixels contained in one line of each image block as a plurality of target pixels; obtaining a gray scale value of each pixel; generating an average representative gray-scale value for each image block according to a histogram of a plurality of gray-scale values of a plurality of pixels included in each image block; inputting the average representative gray scale value of each image block into a first lookup table to obtain a first gain of each image block; inputting a vertical pixel position of one of a plurality of target pixels included in one of the plurality of image blocks and an average representative gray scale value of the one of the plurality of image blocks into a second lookup table to obtain a second gain of the one of the plurality of target pixels; obtaining a compensated gray-scale value of one of the plurality of target pixels by multiplying the gray-scale value of the one of the plurality of target pixels, the first gain of the one of the plurality of image blocks, and the second gain of the one of the plurality of target pixels; and replacing the plurality of gray scale values of the plurality of target pixels with the plurality of compensated gray scale values of the plurality of target pixels, respectively, to obtain compensated image data.
In some embodiments, the histogram includes a plurality of bins (bins) corresponding to a different plurality of gray scale value ranges, respectively; the height of one of the plurality of straight sides represents the total number of the plurality of pixels in the gray scale value range corresponding to the one of the plurality of straight sides.
In some embodiments, the plurality of pixels included in the one of the plurality of image blocks are arranged in a plurality of rows and a plurality of columns; the plurality of target pixels of the one of the plurality of image blocks are a plurality of pixels located in a middle column of the one of the plurality of image blocks.
In some embodiments, the average representative gray scale value of the one of the plurality of image blocks corresponds to an average of a plurality of gray scale values of a plurality of pixels included in the one of the plurality of image blocks.
In some embodiments, the plurality of straight directions respectively correspond to a plurality of weight values, wherein the image compensation unit is further configured to: the total number of the plurality of bins is updated by multiplying the total number of the plurality of bins by the weight of the one of the plurality of bins when generating the average representative gray scale value for each image block.
In some embodiments, the image compensation unit is further configured to: performing linear interpolation computation to obtain a plurality of compensated gray scale values of a plurality of pixels other than the plurality of target pixels; and replacing the plurality of gray scale values of the plurality of pixels except the plurality of target pixels with the plurality of compensated gray scale values of the plurality of pixels except the plurality of target pixels, respectively, to obtain compensated image data.
In some embodiments, the linear interpolation computation comprises: determining two adjacent target pixels closest to one of the plurality of pixels other than the plurality of target pixels in the horizontal direction; and linearly interpolating the determined compensated gray-scale values of two adjacent target pixels to calculate the compensated gray-scale values of one of the plurality of pixels other than the plurality of target pixels.
In some embodiments, the plurality of pixels included in the one of the plurality of image blocks are arranged in a plurality of rows and a plurality of columns; the plurality of target pixels of the first one of the plurality of image blocks are a plurality of pixels located in a first column of the first one of the plurality of image blocks; the plurality of target pixels of the last of the plurality of image blocks are a plurality of pixels located in a last column of the last of the plurality of image blocks.
In some embodiments, the weight value of one of the plurality of bins corresponding to the lower gray scale value range is less than the weight value of another of the plurality of bins corresponding to the higher gray scale value range.
In some embodiments, the second gain of one of the plurality of target pixels at the higher vertical pixel position is less than the second gain of another of the plurality of target pixels at the lower vertical pixel position.
In order to make the above features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
The embodiments of the present invention will be better understood from the following detailed description taken in conjunction with the accompanying drawings. It should be noted that, according to standard practice in the industry, the features are not drawn to scale. In fact, the dimensions of the various features may be arbitrarily increased or reduced for clarity of discussion.
Fig. 1 is a system block diagram of an organic light emitting diode display device according to some embodiments of the present invention.
Fig. 2 is a system block diagram of a timing controller of an organic light emitting diode display device according to some embodiments of the present invention.
Fig. 3 is a flowchart of an operation method of a timing controller of an organic light emitting diode display device according to some embodiments of the present invention.
Fig. 4 is a first lookup table according to some embodiments of the invention.
Fig. 5 is a second lookup table according to some embodiments of the invention.
Reference numerals illustrate:
100: organic light emitting diode display device
120: time sequence controller
121: receiving unit
122: image compensation unit
123: overdrive unit
124: digital gamma correction unit
125: color transfer unit
126: transmission unit
140: display panel
1000: method of operation
1100-1900: step (a)
Detailed Description
Embodiments of the present invention are discussed in detail below. However, it is to be understood that the embodiments provide many applicable concepts that can be embodied in a wide variety of specific contexts. The discussed, disclosed embodiments are merely illustrative of and do not limit the scope of the invention. The terms "first," "second," "third," … …, etc. as used herein do not denote a particular order or sequence, but rather are merely used to distinguish one element or operation from another in the same technical terms.
Fig. 1 is a system block diagram of an organic light-emitting diode (OLED) display device 100 according to some embodiments of the invention. The organic light emitting diode display device 100 includes a timing controller (timing controller) 120 and a display panel 140 including a plurality of pixels. The timing controller 120 includes an image compensation unit 122.
Fig. 2 is a system block diagram of the timing controller 120 of the organic light emitting diode display device 100 according to some embodiments of the present invention. The timing controller 120 receives image data of an input image having a plurality of gray scale values corresponding to a plurality of pixels of the display panel 140 and transmits a voltage signal (as "data output" shown in fig. 2) for driving the display panel 140 accordingly. As shown in fig. 2, the timing controller 120 includes a receiver (Rx) unit 121, an image compensation unit 122, an Overdrive (OD) unit 123, a digital gamma correction (digital gamma correction, DGC) unit 124, a color transfer (dimming) unit 125, and a transmission (Tx) unit 126. The receiving unit 121 is configured to receive image data (image data) of an input image. The image compensation unit 122 is used for generating compensated image data according to the image data of the input image (compensated image data). The transmission unit 126 is used for outputting the compensated image data, so that the timing controller 120 transmits a voltage signal corresponding to the compensated image data. The display panel 140 includes a gate driver and a source driver for receiving voltage signals from the timing controller 120, and the display panel 140 performs a picture display according to the voltage signals corresponding to the compensated image data. Specifically, the compensated image data generated by the image compensation unit 122 is used to compensate for the brightness decay (brightness degradation) caused by the circuit voltage Drop (IR-Drop) phenomenon caused by the organic light emitting diode display device 100, and details of the calculation of the compensated image data will be discussed below. The overdrive unit 123 is used to reduce motion artifacts (motion artifacts) of the organic light emitting diode display device 100. The digital gamma correction unit 124 is used for correcting the image data. The dithering unit 125 is used for increasing the smoothness of the image displayed on the display panel 140.
Fig. 3 is a flowchart of an operation method 1000 of the timing controller 120 of the organic light emitting diode display device 100 according to some embodiments of the present invention. Please refer to fig. 1 and fig. 3 together. First, in step 1100, image data of an input image including a plurality of pixels is provided, and then the image data is received by the image compensation unit 122 of the organic light emitting diode display device 100. Next, in step 1200, the image compensation unit 122 is configured to divide the input image into a plurality of image blocks along the horizontal direction. The pixels included in each image block are arranged in a plurality of columns and a plurality of rows. In some embodiments of the present invention, the display panel 140 is a 4K ultra-high resolution (Ultra High Definition, UHD) RGB color panel having 3840x2160 pixels, and the input image is divided into 16 image blocks along the horizontal direction, i.e. each image block has 240x2160 pixels, and the 240x2160 pixels have corresponding 240x2160 gray-scale values, but the present invention is not limited thereto.
Next, in step 1300, the image compensation unit 122 is configured to select a plurality of pixels included in one of the columns in each of the image blocks as a plurality of target pixels. In one embodiment of the present invention, a plurality of pixels included in a middle column of each image block are selected as a plurality of target pixels. For example, if each image block has 240x2160 pixels, 2160 pixels located in the 120 th column in each image block are selected as 2160 target pixels for each image block. In another embodiment of the present invention, a plurality of pixels included in a first line in a first image block are selected as a plurality of target pixels of the first image block, and a plurality of pixels included in a last line in a last image block are selected as a plurality of target pixels of the last image block. For example, if each image block has 240x2160 pixels, 2160 pixels located in the 1 st column among the first image block (leftmost image block) are selected as 2160 target pixels of the first image block, and 2160 pixels located in the 240 th column among the last image block (rightmost image block) are selected as 2160 target pixels of the last image block. Next, in step 1400, the image compensation unit 122 is configured to obtain a plurality of pixels included in the input image having a plurality of corresponding gray-scale values.
Next, in step 1500, the image compensation unit 122 is configured to generate an average representative gray-scale value of each image block according to a histogram of a plurality of pixels included in each image block having a plurality of corresponding gray-scale values. In some embodiments of the present invention, the histogram of the plurality of pixels included in each image block respectively has a plurality of corresponding gray levels, each histogram includes a plurality of bins (bins) respectively corresponding to a plurality of different gray level ranges, and a height of one of the plurality of bins represents a total number of the plurality of pixels having gray levels falling within the gray level range corresponding to the one of the plurality of bins. For example, the histogram of the plurality of pixels included in each image block having the corresponding plurality of gray levels includes 32 bins (bins), and the 32 bins correspond to 32 gray level ranges (wherein the 32 gray level ranges are respectively the gray level 0-7, the gray level 8-15, the gray level 16-23, … …, the gray level 232-239, the gray level 240-247, and the gray level 248-255). It should be noted that the present invention applies a way of reducing the spatial sampling (spatial down sampling) to reduce the data amount of the signal transmission, so that the histogram of the pixels contained in each image block with the corresponding gray-scale values includes 32 bins, but the present invention is not limited thereto. Further, the order of one of the plurality of gray-scale value ranges is defined as a representative gray-scale value of the one of the plurality of gray-scale value ranges. For example, the representative gray scale value of the gray scale range of gray scale values 0 to 7 is 0 (herein referred to as level_0), the representative gray scale value of the gray scale range of gray scale values 8 to 15 is 1 (herein referred to as level_1), the representative gray scale value of the gray scale range of gray scale values 16 to 23 is 2 (herein referred to as level_2), the representative gray scale value of the gray scale range of gray scale values 232 to 239 is 29 (herein referred to as level_29), the representative gray scale value of the gray scale range of gray scale values 240 to 247 is 30 (herein referred to as level_30), and the representative gray scale value of the gray scale range of gray scale values 248 to 255 is 31 (herein referred to as level_31). Based on the height of each bar, the total number of pixels (referred to herein as count) having gray-scale values falling within the corresponding gray-scale value range is obtained. In some embodiments of the present invention, the total number of pixels having a gray level within the gray level range of gray level 0-gray level 7 is referred to herein as count_0, the total number of pixels having a gray level within the gray level range of gray level 8-gray level 15 is referred to herein as count_1, the total number of pixels having a gray level within the gray level range of gray level 16-gray level 23 is referred to herein as count_2, the total number of pixels having a gray level within the gray level range of gray level 232-gray level 239 is referred to herein as count_29, the total number of pixels having a gray level within the gray level range of gray level 240-gray level 247 is referred to herein as count_30, and the total number of pixels having a gray level within the gray level range of gray level 248-gray level 255 is referred to herein as count_31. The average representative gray-scale value of each image block is calculated by the following formula: average representative gray-scale value= (count_0×level_0+count_1×level_1+, +count_30×level_30+count_31×level_31)/32. Therefore, it can be understood that the average representative gray-scale value of one of the plurality of image blocks corresponds to the average value of the plurality of pixels included in the one of the plurality of image blocks respectively having a corresponding plurality of gray-scale values.
For example, when the total number of pixels having a gray level within the gray level range of gray level 0 to gray level 7 is 30, the total number of pixels having a gray level within the gray level range of gray level 8 to gray level 15 is 60, the total number of pixels having a gray level within the gray level range of gray level 240 to gray level 247 is 20, and the total number of pixels having a gray level within the gray level range of gray level 248 to gray level 255 is 10, the representative gray level is averaged by the following formula: average representative gray scale values= [ (30×0+60×1+ ].+ 20×30+10×31)/32 ].
In some other embodiments of the present invention, the plurality of straight sides further correspond to the plurality of weight values, so in step 1500, the image compensation unit 122 is further configured to update the height of one of the plurality of straight sides by multiplying the height of the one of the plurality of straight sides (i.e. the total number of the plurality of pixels having the gray level value within the gray level range corresponding to the one of the plurality of straight sides) with the weight value of the one of the plurality of straight sides, thereby obtaining an updated average representative gray level value (referred to herein as a weighted average representative gray level value). In some embodiments of the present invention, the weight of the straight-side of the gray-scale range corresponding to the gray-scale values 0-7 is referred to herein as weight_0, the weight of the straight-side of the gray-scale range corresponding to the gray-scale values 8-15 is referred to herein as weight_1, the weight of the straight-side of the gray-scale range corresponding to the gray-scale values 16-23 is referred to herein as weight_2, the weight of the straight-side of the gray-scale range corresponding to the gray-scale values 232-239 is referred to herein as weight_29, the weight of the straight-side of the gray-scale range corresponding to the gray-scale values 240-247 is referred to herein as weight_30, and the weight of the straight-side of the gray-scale range corresponding to the gray-scale values 248-255 is referred to herein as weight_31. In this case, the weighted average representative gray-scale value of each image block is calculated by the following equation: the weighted average representative gray-scale value= [ (weight_0×count_0×count_0+weight_1×count_1×count_1+ ] +weight_30×count_30×count_30+weight_31×count_31×count_31)/32 ].
In other embodiments of the present invention, the weight value of one of the plurality of bins corresponding to the lower gray scale value range is less than the weight value of another of the plurality of bins corresponding to the higher gray scale value range. For example, the weight of the straight side of the gray scale range corresponding to the gray scale values 0 to 7 is 0.01, the weight of the straight side of the gray scale range corresponding to the gray scale values 8 to 15 is 0.015, the weight of the straight side of the gray scale range corresponding to the gray scale values 240 to 247 is 0.4, and the weight of the straight side of the gray scale range corresponding to the gray scale values 248 to 255 is 0.5. The reason for the above distribution of the weight values is that the luminance degradation (brightness degradation) caused by the circuit voltage Drop (IR-Drop) phenomenon caused by the organic light emitting diode display device 100 is relatively remarkable for brighter pixels (i.e., pixels having larger gray scale values), and thus the larger the gray scale value, the larger the weight value.
Referring back to fig. 3, in step 1600, the image compensation unit 122 is configured to input the average representative gray level value of each image block into the first lookup table to obtain the first gain of each image block. Fig. 4 is a first lookup table according to some embodiments of the invention. In some embodiments of the present invention, as shown in fig. 4, the first gain of one of the plurality of image blocks corresponding to the smaller average representative gray scale value is smaller than the first gain of another of the plurality of image blocks corresponding to the larger average representative gray scale value. The reason for such distribution of the first gain is that the luminance degradation (brightness degradation) caused by the circuit voltage Drop (IR-Drop) phenomenon caused by the organic light emitting diode display device 100 is relatively noticeable for brighter pixels (i.e., pixels having larger gray scale values), and thus the larger the average representative gray scale value, the larger the first gain is accordingly.
Referring back to fig. 3, in step 1700, the image compensation unit 122 is configured to input the vertical pixel position of each target pixel included in one of the plurality of image blocks and the average representative gray scale value of the one of the plurality of image blocks into the second lookup table, respectively, so as to obtain the second gain of the one of the plurality of target pixels. Fig. 5 is a second lookup table according to some embodiments of the invention. In some embodiments of the present invention, each image block has 240x2160 pixels, and the 240x2160 pixels have corresponding 240x2160 gray scale values, respectively, so that a vertical pixel position of one of the plurality of target pixels of each image block is 1 to 2160. In some embodiments of the present invention, as shown in fig. 5, the second gain of one of the plurality of target pixels at the higher vertical pixel position is smaller than the second gain of another of the plurality of target pixels at the lower vertical pixel position. The reason for such distribution of the second gain is that the luminance decay (brightness degradation) caused by the circuit voltage Drop (IR-Drop) phenomenon caused by the organic light emitting diode display device 100 is relatively noticeable for pixels far from the voltage source (also referred to as "ELVDD") located at the top of the display panel 140, i.e., pixels located at lower vertical pixel positions, and thus the lower the vertical pixel position, the larger the second gain accordingly.
Referring back to fig. 3, then, in step 1800, the image compensation unit 122 is configured to obtain the compensated gray-scale value of the one of the plurality of target pixels by multiplying the gray-scale value of the one of the plurality of target pixels, the first gain of the one of the plurality of image blocks, and the second gain of the one of the plurality of target pixels. In some embodiments of the present invention, the image compensation unit 122 is further configured to perform a linear interpolation calculation to obtain a plurality of compensated gray-scale values of a plurality of pixels other than the plurality of target pixels. The linear interpolation computation includes: determining two adjacent target pixels closest to one of the plurality of pixels other than the plurality of target pixels in the horizontal direction; and linearly interpolating the determined compensated gray-scale values of two adjacent target pixels to calculate the compensated gray-scale values of one of the plurality of pixels other than the plurality of target pixels. Specifically, the compensated gray-scale value of one of the plurality of pixels other than the plurality of target pixels is obtained by linearly interpolating the two compensated gray-scale values of the two target pixels closest to the one of the plurality of pixels in the horizontal direction to calculate the compensated gray-scale value of the one of the plurality of pixels.
Next, in step 1900, the image compensation unit 122 is configured to replace the plurality of gray-scale values of the plurality of target pixels with the plurality of compensated gray-scale values of the plurality of target pixels, respectively, so as to obtain compensated image data. In some embodiments of the present invention, the image compensation unit 122 is further configured to replace the plurality of gray-scale values of the plurality of pixels other than the plurality of target pixels with the plurality of compensated gray-scale values of the plurality of pixels other than the plurality of target pixels, respectively, so as to obtain the compensated image data.
In view of the foregoing, the present invention discloses a timing controller of an organic light emitting diode display device and an operating method of the timing controller of the organic light emitting diode display device. The image compensation unit of the timing controller of the organic light emitting diode display device of the present invention is used for generating compensated image data, thereby compensating the brightness attenuation (brightness degradation) caused by the circuit voltage Drop (IR-Drop) phenomenon caused by the organic light emitting diode display device.
The foregoing outlines features of several embodiments so that those skilled in the art may better understand the aspects of the present disclosure. Those skilled in the art should appreciate that they may readily use the present invention as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the present disclosure, and that they may make various changes, substitutions, and alterations herein without departing from the spirit and scope of the present disclosure.
Claims (8)
1. A timing controller, comprising:
a receiving unit for receiving an image data of an input image, wherein the input image comprises a plurality of pixels;
an image compensation unit for generating compensated image data according to the image data; and
A transmission unit for outputting the compensated image data so that a display device including the timing controller performs image display according to the compensated image data;
wherein, this image compensation unit is still used for:
dividing the input image into a plurality of image blocks along a horizontal direction;
selecting the pixels included in one of the columns of each of the plurality of image blocks as a plurality of target pixels;
obtaining a gray scale value of each of the plurality of pixels;
generating an average representative gray-scale value of each of the plurality of image blocks according to a histogram of the plurality of gray-scale values of the plurality of pixels included in each of the plurality of image blocks;
inputting the average representative gray scale value of each of the plurality of image blocks into a first lookup table to obtain a first gain of each of the plurality of image blocks;
inputting a vertical pixel position of one of the plurality of target pixels included in one of the plurality of image blocks and the average representative gray-scale value of the one of the plurality of image blocks into a second lookup table to obtain a second gain of the one of the plurality of target pixels;
obtaining a compensated gray-scale value of one of the plurality of target pixels by multiplying the gray-scale value of the one of the plurality of target pixels, the first gain of the one of the plurality of image blocks, and the second gain of the one of the plurality of target pixels; and
Replacing the plurality of gray scale values of the plurality of target pixels with the plurality of compensated gray scale values of the plurality of target pixels, respectively, to obtain the compensated image data,
wherein the histogram includes a plurality of squares corresponding to a plurality of different gray scale value ranges, respectively;
wherein a height of one of the plurality of straight sides represents a total number of the plurality of pixels in the gray scale value range corresponding to the one of the plurality of straight sides,
wherein the plurality of straight sides respectively correspond to a plurality of weight values, and the image compensation unit is further configured to:
when generating the average representative gray scale value of each of the plurality of image blocks, the total number of the one of the plurality of straight sides is updated by multiplying the total number of the one of the plurality of straight sides by the weight value of the one of the plurality of straight sides.
2. The timing controller of claim 1,
wherein the plurality of pixels included in one of the plurality of image blocks are arranged in a plurality of columns and a plurality of rows;
wherein the plurality of target pixels of the one of the plurality of image blocks are the plurality of pixels located in an intermediate column of the one of the plurality of image blocks.
3. The timing controller of claim 1, wherein the average representative gray scale value of the one of the plurality of image blocks corresponds to an average of the plurality of gray scale values of the plurality of pixels included in the one of the plurality of image blocks.
4. The timing controller of claim 1, wherein the image compensation unit is further configured to:
performing a linear interpolation calculation to obtain the plurality of compensated gray-scale values of the plurality of pixels other than the plurality of target pixels; and
The plurality of gray scale values of the plurality of pixels except the plurality of target pixels are replaced by the plurality of compensated gray scale values of the plurality of pixels except the plurality of target pixels respectively to obtain the compensated image data.
5. The timing controller of claim 4, wherein the linear interpolation computation comprises:
determining two adjacent ones of the plurality of target pixels closest to one of the plurality of pixels other than the plurality of target pixels in the horizontal direction; and
The determined compensated gray scale values of the two adjacent target pixels are linearly interpolated to calculate the compensated gray scale value of the one of the pixels other than the target pixels.
6. The timing controller of claim 1,
wherein the plurality of pixels included in one of the plurality of image blocks are arranged in a plurality of columns and a plurality of rows;
wherein the plurality of target pixels of a first one of the plurality of image blocks is the plurality of pixels located in a first column of the first one of the plurality of image blocks;
wherein the target pixels of a last one of the image blocks are the pixels located in a last column of the last one of the image blocks.
7. The timing controller of claim 1, wherein the weight of one of the plurality of bins corresponding to a lower gray scale range is less than the weight of another of the plurality of bins corresponding to a higher gray scale range.
8. The timing controller of claim 1, wherein the second gain of one of the plurality of target pixels at a higher vertical pixel position is less than the second gain of another of the plurality of target pixels at a lower vertical pixel position.
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| US16/799,861 US11113818B1 (en) | 2020-02-25 | 2020-02-25 | Timing controller and operating method thereof |
| US16/799,861 | 2020-02-25 |
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| US11113818B1 (en) | 2021-09-07 |
| CN113380189A (en) | 2021-09-10 |
| TWI730740B (en) | 2021-06-11 |
| TW202133140A (en) | 2021-09-01 |
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